Gage-glass guard



A. L. HATFIELD.

GAGE GLASS GUARD.

APPL-|CAT|0N FILED JUNE 6 1919- y 1,354,296. PatenteSept. 28, 1920.

M 1. s am@ 32 R 0 T. N E V N v inclose the glass UNITED STAilEs'PATENT, OFFICE.

- lpGrierciri-GLASS.,erinnii. .L i l A Y l Specification of Letters'iatent. .Pat

To all w/wmzft 'mag/concern.' j

Be it'known that l, ANDREW'L. HAT'FIELD, afcitizen of the'llnited States, 'residing at Hillside, in the county `Vand useful Improvements IV in Gage-Glass Y Guards;l and I do hereby declare the following to be a fullc`lear, and exact description of the invention, such as will enable others skilled inthe art torwhich it appertainsto make and use the same, reference being had to the accompanying drawings, and to characters of reference marked thereon, which Yform a part oftliis specification.'V

Y to inclose the glass bodies of water gages..

vThe invention has for its principal object to provide a very simple, cheap and easily applied protecting device for the purposes above mentioned, which is easily adapted to body of a water gage, both to guard the sanieagainst exteriorlyjorigi- Vnating accidentalblows, as well as v.against scattering of fragments ofthe glass body should the same burst from internal causes, and principally for the latter purpose. l

Other objects of the present invention, not at this time more particularly enumerated, will beclearly understood .from thefollowing detailed description of the same.V n

.lVith the various objects of the present invention in view, the same consists, primarily, in the novel construction of steam boiler water gage guard hereinafter set forth, and,

the invention consists, furthermore, in the several novel arrangements and combinations of the various devices and parts, as well as in the details of construction of the same, all of which will be more fully described in Ythe following specification, and then finally embodied in the claims appended thereto. i Y

The inventionis clearly illustrated in the accompanying drawings, in which Figure l is a front elevation of a steam boiler water gage glass provided with the novel protecting guard made according to and embodying the principles/,of the present invention.

Fig. 2 is a vertical longitudinal section Application `med nine e, 1919..

I glass being shown ,of Union `and :State of New Jersey, have inventedcertain new protectingguard when The present invention has reference, gen- Y riorly supporting fittings are formed or tracted longitudinally,

JERSEY, AssIGNon. To THE STRONG w YORK.'

Vexited sepazs, 1920.

. serial' `ivo. 302.2111.H Y

taken on line 2-2 .in saidF ig. l, the gage in elevation. F ig'. 3 is a similar vertical longitudinal section, but showing the manipulation of the placing the gage glass into. the supporting fittings therefor.

llig. 4 is a detail rear side elevation of a portion of the. protecting guard assembled withl the gage glass.

Fig. 5 is a detail horizontal vsection'taken Online 5`5 in said Fig. 2. 'i

Similar characters of reference are eniployed in all of the hereinabove described viewsto .indicate corresponding parts.

Referring now to vsaid drawings, the reference character l indicates an upper tting or socket member for. connection with a steam. boiler, or the like, (not shown), and Y thereierence character n fitting oi socket member-for like connection 2 indicates a lower with said steam boiler.

Each socket member or fitting l and 2 is provided with an extethreaded stufling-box neck 3,having a cylindrical opening 4 for the reception of the ends .of the tubular gage glass v5. An internally threaded cap or nut 6, having a central opening 7 in the' body thereof, to permit an end of the gage glass 5 to extend therethrough, screws upon `each stufiing box neck 3, to hold under expanded pressure and inA tightly embracing relation to the ends of the gage glass a suitable packing 8, adapted to thus form leak tight joints between' the D and tlierespective ends of said gage glass inserted therein.

Thefnovel protecting guard comprises a body portion YQadapted to surround the gage -glass and so constructed as to provide a submaintained against longitudinal contraction or expansion, while its end portions l0 constructed to be readily conso that the same will yield to a loosening or unscrewing .movement of the caps orrnuts G from the fittings l and 2, when either applying or removing a gage glass toY or from said fittings.

Preferably I construct said body portion 9 and its end portions 10 of spring wire coiled into spirally convoluted form to embrace the gage glass throughout its exposed longitudinal extent, thus providing between the iio -V Y I y j `f rigid-longitudinally extending bracing strip convolutions suitably disposed open spaces f Preferably theV diameter of the Vspirally convoluted body and itsyieldableend:por-v tions is vslightly Vgreater than the'v diameter ofthe gageglass topbe inclosed therebyLInl f order to Iretain'the main intermediate part of said spirally convoluted body against longitudinal contraction, there is provided a 12, which is di'sposed'within the spirally convolutedbody against theiniier side thereof,

j fand tof-which certain longitudinally spaced i a very which proves'q'uite satisfactory. This me- `chanical Vcoupling comprises a tongue or by suitablei'neans, suoli for example, as by AYavmech'anical coupling, solder, welding, brazing, Vor any other' 'desired means.

fVhenA it is .desired lto Vluse -a mechanical coupling, -I haveillustrated in'Y the Vdrawings simple lvand effective, construction lug 13 struck out from the body of the bracing strip '12, and lthen bent outwardly', over and around an adjacent convolution of the body,'to thereby secure the latter to thebrac- Vv of said body 4'30 that the intermediate portion between such 'couplings Vis securely retained against longitudinal contraction.

Those portions of the spirally convoluted ing strip, so

ybody'whichy project'k beyond the outer couthel end portions 10,A are free wit, v Y

longitudinal contraction or comto yield to oi' the guard aV longi tudinally compressible portion subject Vto suilicient contraction, or reduction in length, as" will easily permit the caps or vnuts 6 to be unscrewed from the ittings 1 and 2', as is clearly illustrated in' Fig. 3 of the drawings.

Secured to the extremity ofv each yieldable end portionlO of the's'pir'ally convoluted body'is a errule 14, provided at its -outer end with an inwardly projecting anr Y nular {iange 15, aga-inst which 'the respective extremities oic said end portions 10V abut, and to which said extremities are secured by means ot'solder, or'by any other suitable fastening means.

. When thev guard device is properly assembledrin embracing' or in'- Vclosing relation tofthe gage glass, and the latter is secured between the fittings 1 and .'2, the compressible end portions 10, by virtuef'of their tendency to Yresume normal longitudinal extension after compression, press v12 is solocated '1. the gage glass, yand saidV bracing'V strip Y may of my device,

thus ,constructed i and thus holdrthejguard' in kcompletely enveloping relation to the exposed portion of thegageV glass.. Preferably the bracingstrip as to be positioned behind be painted or otherwisev colored, so that-the same when yiewe'd'through the water-in the gage glass will,seeminglyimparty its color to the water, thus rendering .they levelfoi said waterV morecl'eaily visiblef 1I' Vam aware that j colored rods and strips have been heretofore employed 'for this purpose', and consequentlyV convolution'sof the'body are rigidly secured fI makeno'special claim inY this! connection,

Vexcept-to'poii'it out'thatvtlie bracingstriplQ aside from its more important mechanical function; is well adapted V`Vfor such purpo`se"" v I I 'am awa made inthe arrangements and'fcombin'ations '4othe various devices'andparts as well as in the details Vof the construction ofthe same,

rey that some ,changes may be soV withoutdeparting from the scope of'iny invention as set forth"inthefforegoing speci-` ',cation'and as, defined ,in i. the appended claims. lI-Ience, I do not limit my zinvention to the exact arrangements and combinations j of the devices andpa'rts as described in said specification, nork do Ir'conine myself tothe? exact details'o'f tlieconstructioii of thesaid parts as illustrated in: the accompanying drawings.l V

I claim :el g p 1. Av gage glassguard comprising an en-v 'l Yveloping spirally convoluted body having longitudinally contractible end portions, and

a rigidbracing strip extending through said lbody to which the' intermediate Y portion of the latter is secured to retainl V against 4longitudinal contraction. l 2. A gage glass guard comp'risingan enveloping spirally convolutedjbody having `the j same longitudinally vcontractible end portions, a y

rigid bracing strip extending through'said body to which the intermediate portion of the latter is vsecured to retain vthe same against longitudinal contraction, and ferrulescon'nec'ted with the 'extremities offsaid contractible` end portions.

Y Y In testiniony,`that I kclaim the invention set forth aboveI-have hereunto set my hand ANDREW L; HATFIELD.

Witnesses: y Y Y AGrEoRGiiD. RICHARDS, ,Y BARBARA SU'r'rnRLiN, 

